Leadership models

A survey of the major leadership theories, from traits to transformational, servant, Level 5, adaptive and authentic leadership, plus power, trust, influence and followership, each with a blunt rating of how good the evidence is. Practical management techniques (one-on-ones, delegation, feedback, hiring) are in people management, team-level models in five dysfunctions, and the military-derived models in OODA loop, extreme ownership and mission command.

How to read the evidence ratings

Leadership research is noisy: most studies are cross-sectional surveys in which followers rate their own leader on both the "style" and the outcomes, which inflates correlations. Popular books are mostly case studies picked after the fact. Ratings used on this sheet:

No major leadership model earns a clean A. The closest are the trait and behavior meta-analyses, and the psychological safety research in five dysfunctions.

Trait approaches

Idea: leaders are born with, or at least have, distinctive traits. Thomas Carlyle's 19th-century "great man" view is the ancestor.

Why traits fell out of favor and partly returned. Early work lacked a common trait taxonomy and mixed up emerging as a leader (being seen as one) with being effective. The Big Five gave a common language, and meta-analysis showed small-to-moderate but reliable effects. Traits predict who gets picked and, less strongly, who does well; they don't tell you what to do.

Evidence: B. Useful for selection and self-awareness. Caveat: extraversion predicts being seen as a leader more than being effective, so selection on charisma tends to over-promote confident talkers.

Behavior and contingency models, briefly

Goleman's six leadership styles

Daniel Goleman, "Leadership That Gets Results" (Harvard Business Review, March–April 2000), drew on consultancy Hay/McBer's data on 3,871 executives, selected from a database of more than 20,000. He found six styles, each linked to components of emotional intelligence, and measured their effect on climate: flexibility, responsibility, standards, rewards, clarity and commitment.

• The headline finding: leaders with the best results didn't rely on one style; they used most of them in a given week, depending on the situation. Goleman's analogy is a golfer choosing clubs.
• Pacesetting is the founder-engineer's trap: high personal standards, doing it yourself, impatience with slower people. Goleman expected it to help and found it corroded climate.
• The 2000 article organizes emotional intelligence into four capabilities (self-awareness, self-management, social awareness, social skill), not the five components of his 1998 article (below).

Evidence: C. Proprietary consultancy data, not peer reviewed or independently replicated; climate was measured by surveys of the same organizations. The style list is a good practical vocabulary; the precise effects are not established science.

Transformational vs transactional leadership

James MacGregor Burns (Leadership, 1978) contrasted transactional leadership (an exchange: work for reward) with transforming leadership (leaders and followers raise each other's motivation and morality). Bernard Bass (Leadership and Performance Beyond Expectations, 1985) turned it into a measurable theory; with Bruce Avolio he built the full-range leadership model and the Multifactor Leadership Questionnaire (MLQ).

Contingent reward sometimes predicted outcomes better than transformational leadership. Plain transactional management (clear deals, kept promises) is underrated.

The critique. Daan van Knippenberg and Sim Sitkin (2013, Academy of Management Annals), "Back to the Drawing Board?", identified four fundamental problems: no clear conceptual definition; no causal model for how each dimension works; the construct is confounded with its effects (it's partly defined by success); and the standard questionnaires don't reproduce the theory's dimensions. They recommended abandoning the charismatic–transformational label in favor of more clearly defined behaviors.

Evidence: B−. Robust correlations with outcomes; serious doubts about what exactly is being measured.

Servant leadership

Robert K. Greenleaf, "The Servant as Leader" (essay, 1970): the leader is servant first, and the best test is "Do those served grow as persons? Do they become healthier, wiser, freer, more autonomous, more likely themselves to become servants?" Larry Spears later listed ten characteristics: listening, empathy, healing, awareness, persuasion, conceptualisation, foresight, stewardship, commitment to people's growth, and building community.

Evidence: B−. A meta-analysis (Hoch, Bommer, Dulebohn and Wu 2018, Journal of Management) found servant leadership explained meaningful variance beyond transformational leadership, unlike authentic and ethical leadership, which largely overlapped with it. Measurement is still inconsistent across studies. Critique: the "servant" framing can drift into conflict avoidance and slow decisions.

Level 5 leadership

Jim Collins, Good to Great (2001), studied 11 companies that moved from average to sustained outperformance and found their CEOs combined personal humility with intense professional will.

Collins' "window and mirror": credit goes out the window to others when things go well; the leader looks in the mirror when things go badly.

The critique.

• The companies declined. Circuit City filed for bankruptcy in 2009; Fannie Mae was placed into government conservatorship in 2008; Wells Fargo later had its fake-accounts scandal. Steven Levitt noted that a portfolio of the 11 bought when the book came out would have underperformed the S&P 500.
• Halo effect. Phil Rosenzweig (The Halo Effect, 2007) argued that the data came largely from press accounts and interviews written after success was known, so "humble, disciplined" leaders were partly attributions caused by good results.
• Selecting on the outcome. Picking winners and looking back for common traits can't separate causes from luck. Collins' own follow-up, How the Mighty Fall (2009), addresses the declines.

Evidence: D as a causal claim. The humility-plus-will description remains a useful personal ideal.

Kouzes and Posner: five practices of exemplary leadership

James Kouzes and Barry Posner, The Leadership Challenge (first edition 1987), built from thousands of "personal best leadership experience" case studies and their Leadership Practices Inventory (LPI).

Evidence: C. Much of the supporting research uses the authors' own instrument and self-reported "personal best" stories. The practices overlap heavily with transformational leadership. A good, balanced checklist.

Sinek's Golden Circle

Simon Sinek, Start With Why (2009) and the 2009 TED talk "How great leaders inspire action": inspiring leaders and companies communicate from the inside out, why → how → what, rather than what → how → why.

• Useful as a communication rule: lead with purpose before features, especially when recruiting or pitching.
• Sinek claims the circle maps onto brain anatomy: the "what" to the neocortex (rational), the "why" and "how" to the limbic brain (feelings and decisions). This relies on the outdated "triune brain" model; neuroscientists don't support a neat rational neocortex vs emotional limbic split, and there's no evidence that purpose-first messages work because of this.
• The examples (Apple, the Wright brothers, Martin Luther King Jr.) are selected after the fact.

Evidence: D for the theory; the communication advice is reasonable common sense.

Authentic leadership

Popularised by former Medtronic CEO Bill George (Authentic Leadership, 2003), and formalised by Fred Walumbwa and colleagues (2008, Journal of Management) with four components:

Evidence: C. A meta-analysis (Banks, McCauley, Gardner and Guler 2016, Leadership Quarterly) found it correlated about .72 with transformational leadership, raising doubts that it's a distinct construct; Hoch et al. (2018) found little incremental value. Critique: "be yourself" can excuse bad behavior ("I'm just being authentic"); effective leaders also adapt their style to situations.

Adaptive leadership

Ronald Heifetz (Leadership Without Easy Answers, 1994; with Marty Linsky, Leadership on the Line, 2002; with Alexander Grashow and Linsky, The Practice of Adaptive Leadership, 2009). Central distinction:

Heifetz and Donald Laurie's "The Work of Leadership" (Harvard Business Review, 1997) lists principles, paraphrased:

• Get on the balcony: step out of the action (the "dance floor") to see patterns, including your own part in them.
• Identify the adaptive challenge: what values or habits have to change?
• Regulate distress: enough pressure to motivate change, not so much that people freeze or revolt.
• Maintain disciplined attention: keep people on the hard issue when they drift to avoidance.
• Give the work back to the people: don't solve it for them; they must own the change.
• Protect voices of leadership from below: don't silence the people raising uncomfortable questions.

Evidence: C. Conceptually strong and widely taught (Harvard Kennedy School), but based on cases and teaching practice rather than systematic empirical testing.

The trust equation

David Maister, Charles Green and Robert Galford, The Trusted Advisor (2000):

Green's own view is that self-orientation, alone in the denominator, is the most powerful variable: high self-orientation divides everything else away. Worked example: a technically brilliant lead (C = 9) who always delivers (R = 8), whom nobody tells problems to (I = 3), and who visibly optimizes for their own promotion (S = 8) scores $20/8 = 2.5$. A slightly less expert peer with C = 7, R = 8, I = 7 and S = 3 scores $22/3 \approx 7.3$.

Evidence: D. A heuristic, not a measured model; the numbers are illustrative. Useful as a self-audit.

Influence without authority and power bases

Power bases (French and Raven)

John French and Bertram Raven (1959, in Cartwright, ed., Studies in Social Power) named five bases of social power; Raven added a sixth, informational, in 1965.

Personal power (expert, referent, informational) tends to produce commitment; positional power (legitimate, reward, coercive) tends to produce compliance. Coercive power used routinely destroys trust (see five dysfunctions).

Influence without authority (Cohen and Bradford)

Allan Cohen and David Bradford (Organizational Dynamics, 1989; book Influence Without Authority, 1990) apply the law of reciprocity: people help those who help them. Influence means trading "currencies" the other person values.

The process: treat the other person as a potential ally; clarify your goals; diagnose their world (goals, pressures, currencies); assess what you can offer; build the relationship; make the exchange. The mistake is assuming the other side values what you value.

Evidence: C for both frameworks as practical tools. Power bases have been studied extensively, but measurement is inconsistent.

Emotional intelligence

Peter Salovey and John Mayer coined the academic concept in 1990; Daniel Goleman popularised it (Emotional Intelligence, 1995) and applied it to leadership in "What Makes a Leader?" (HBR, 1998) with five components: self-awareness, self-regulation, motivation, empathy and social skill.

The debate.

• Edwin Locke (2005, Journal of Organizational Behavior), "Why emotional intelligence is an invalid concept", argued the construct is so broad it becomes meaningless, and that it's really skills applied to emotion, not a separate intelligence.
• Mixed models overlap heavily with Big Five personality and cognitive ability, so critics ask what's new.
• Joseph and Newman (2010, Journal of Applied Psychology): ability EI predicted performance inconsistently: positively in jobs high in emotional labor, negatively in jobs low in it.
• O'Boyle et al. (2011, Journal of Organizational Behavior): the three streams of EI measures correlated .24–.30 with job performance, and self-report and mixed measures added prediction beyond IQ and the Big Five.
• Popular claims that EI matters more than IQ for success aren't supported by these meta-analyses.

Evidence: C/B, contested. The underlying skills (reading people, managing your own reactions) are clearly useful for managers; treating EI as a single measurable intelligence is on weaker ground.

The Peter principle

Laurence Peter and Raymond Hull, The Peter Principle (1969), a satirical book: in a hierarchy, people are promoted until they reach their "level of incompetence", because promotion rewards performance in the current job rather than aptitude for the next one.

• Benson, Li and Shue ("Promotions and the Peter Principle", Quarterly Journal of Economics, 2019), using data on sales workers at 214 firms, found evidence consistent with it: firms promoted the best salespeople, who then performed worse as managers than colleagues with better predictors of managerial ability.
• The founder-engineer version: promoting the best engineer to engineering manager by default.

Countermeasures: separate individual-contributor and management career tracks with equal status and pay; judge promotion to management on management signals (mentoring, coordination, judgment), not output; make it reversible without stigma.

Evidence: B that it happens in at least some settings; how general it is remains unclear.

High standards (Bezos)

Jeff Bezos' 2017 letter to shareholders on high standards, paraphrased except where quoted:

His application is the six-page memo (see people management): memos often fail not because the writer can't recognize a great memo, but because they expected it to take a day or two when it takes a week or more.

Evidence: D (one CEO's practice), but consistent with research on deliberate practice and clear performance standards. For a small team: write down what "great" looks like for the few things that matter most (a PR, a design doc, an incident report), with examples, and say how long it should take.

Followership

Leadership only exists in relation to followers, and most people spend most of their careers following.

For a leader: build a team of exemplary followers by rewarding challenge (see psychological safety in five dysfunctions), and be a good follower to your own board, investors or boss.

Evidence: C. Conceptual models with limited empirical testing; Kelley's typology is widely used in teaching.

Comparison table

Which model when

Self-assessment checklist

Score each 1 (rarely) to 5 (consistently). Anything at 2 or below is your development goal for the quarter. Ask two team members to score you too; the gaps are more informative than the scores.

DIRECTION
[ ] My team can state our goal and why it matters in one
    sentence (inspirational motivation, compelling direction)
[ ] I explain the reasons behind decisions, not just the
    decisions
[ ] I make clear deals: what's expected, what they get,
    and I keep my side (contingent reward)
 
PEOPLE
[ ] I adjust how closely I supervise to each person's
    experience with the specific task (TRM / situational)
[ ] I spend time on each person's growth, not only their
    output (individualised consideration, servant)
[ ] I give specific, timely feedback, positive and
    corrective, in private
 
SELF
[ ] I admit mistakes to the team, promptly
[ ] I notice when I'm pacesetting or coercing, and why
[ ] My self-orientation is low: people believe I'm
    working for them and the company, not my career
[ ] I know my own blind spots and have asked for input
    on them in the last 3 months
 
CHANGE AND INFLUENCE
[ ] I can tell a technical problem from an adaptive one,
    and I don't reorganize to avoid a hard conversation
[ ] I get things done with peers and other teams without
    escalating (influence without authority)
[ ] I reward people who challenge me with good arguments
    (followership, psychological safety)
 
STANDARDS
[ ] I've shown the team examples of what "great" looks
    like for our key outputs
[ ] My expectations of how long good work takes are
    realistic

References

• Stogdill (1948), Personal factors associated with leadership: a survey of the literature (opens in a new tab), Journal of Psychology 25(1): the review that undermined early trait theory
• Judge, Bono, Ilies and Gerhardt (2002), Personality and leadership: a qualitative and quantitative review (opens in a new tab), Journal of Applied Psychology 87(4): Big Five meta-analysis
• Judge, Colbert and Ilies (2004), Intelligence and leadership (opens in a new tab), Journal of Applied Psychology 89(3)
• Judge, Piccolo and Ilies (2004), The forgotten ones? Consideration and initiating structure (opens in a new tab), Journal of Applied Psychology 89(1)
• Daniel Goleman (2000), Leadership That Gets Results (opens in a new tab), Harvard Business Review: the six styles
• James MacGregor Burns, Leadership (Harper & Row, 1978); Bernard M. Bass, Leadership and Performance Beyond Expectations (Free Press, 1985): transforming and transformational leadership
• Judge and Piccolo (2004), Transformational and transactional leadership: a meta-analytic test of their relative validity (opens in a new tab), Journal of Applied Psychology 89(5)
• van Knippenberg and Sitkin (2013), A critical assessment of charismatic–transformational leadership research: back to the drawing board? (opens in a new tab), Academy of Management Annals 7(1)
• Robert K. Greenleaf, The Servant as Leader (essay, 1970; Greenleaf Center)
• Hoch, Bommer, Dulebohn and Wu (2018), Do ethical, authentic, and servant leadership explain variance above and beyond transformational leadership? (opens in a new tab), Journal of Management 44(2)
• Jim Collins, Good to Great (HarperBusiness, 2001) and How the Mighty Fall (2009)
• Phil Rosenzweig, The Halo Effect (Free Press, 2007): critique of Collins and similar business research
• Niendorf and Beck (2008), Good to Great, or just good? (opens in a new tab), Academy of Management Perspectives 22(4)
• James M. Kouzes and Barry Z. Posner, The Leadership Challenge (Jossey-Bass, 1987; later editions) and The Five Practices (opens in a new tab)
• Simon Sinek, Start With Why (Portfolio, 2009)
• Bill George, Authentic Leadership (Jossey-Bass, 2003)
• Walumbwa et al. (2008), Authentic leadership: development and validation of a theory-based measure (opens in a new tab), Journal of Management 34(1)
• Banks, McCauley, Gardner and Guler (2016), A meta-analytic review of authentic and transformational leadership: a test for redundancy (opens in a new tab), Leadership Quarterly 27(4)
• Ronald A. Heifetz, Leadership Without Easy Answers (Harvard University Press, 1994); Heifetz and Marty Linsky, Leadership on the Line (2002); Heifetz, Grashow and Linsky, The Practice of Adaptive Leadership (2009)
• Ronald A. Heifetz and Donald L. Laurie, "The Work of Leadership", Harvard Business Review, January–February 1997
• David H. Maister, Charles H. Green and Robert M. Galford, The Trusted Advisor (Free Press, 2000) and Trusted Advisor Associates: the trust equation (opens in a new tab)
• John R. P. French and Bertram Raven, "The Bases of Social Power", in D. Cartwright (ed.), Studies in Social Power (University of Michigan, 1959)
• Cohen and Bradford (1989), Influence without authority: the use of alliances, reciprocity, and exchange to accomplish work (opens in a new tab), Organizational Dynamics 17(3); and the book Influence Without Authority (Wiley, 1990)
• Salovey and Mayer (1990), Emotional intelligence (opens in a new tab), Imagination, Cognition and Personality 9(3)
• Daniel Goleman, "What Makes a Leader?", Harvard Business Review, November–December 1998: the five components
• Locke (2005), Why emotional intelligence is an invalid concept (opens in a new tab), Journal of Organizational Behavior 26(4)
• Joseph and Newman (2010), Emotional intelligence: an integrative meta-analysis and cascading model (opens in a new tab), Journal of Applied Psychology 95(1)
• O'Boyle et al. (2011), The relation between emotional intelligence and job performance: a meta-analysis (opens in a new tab), Journal of Organizational Behavior 32(5)
• Laurence J. Peter and Raymond Hull, The Peter Principle (William Morrow, 1969)
• Benson, Li and Shue (2019), Promotions and the Peter Principle (opens in a new tab), Quarterly Journal of Economics 134(4)
• Jeff Bezos, 2017 Letter to Shareholders (opens in a new tab): high standards
• Robert E. Kelley, "In Praise of Followers", Harvard Business Review, November–December 1988; Ira Chaleff, The Courageous Follower (Berrett-Koehler, 1995); Barbara Kellerman, Followership (Harvard Business Press, 2008)